CVE-2021-47101: asix: fix uninit-value in asix_mdio_read()

Published Mar 4, 2024
·
Updated

In the Linux kernel, the following vulnerability has been resolved:

asix: fix uninit-value in asixmdioread()

asixreadcmd() may read less than sizeof(smsr) bytes and in this case smsr will be uninitialized.

Fail log: BUG: KMSAN: uninit-value in asixcheckhostenable drivers/net/usb/asixcommon.c:82 [inline] BUG: KMSAN: uninit-value in asixcheckhostenable drivers/net/usb/asixcommon.c:82 [inline] drivers/net/usb/asixcommon.c:497 BUG: KMSAN: uninit-value in asixmdioread+0x3c1/0xb00 drivers/net/usb/asixcommon.c:497 drivers/net/usb/asixcommon.c:497 asixcheckhostenable drivers/net/usb/asixcommon.c:82 [inline] asixcheckhostenable drivers/net/usb/asixcommon.c:82 [inline] drivers/net/usb/asixcommon.c:497 asixmdioread+0x3c1/0xb00 drivers/net/usb/asixcommon.c:497 drivers/net/usb/asixcommon.c:497

Other sources

In the Linux kernel, the following vulnerability has been resolved:

asix: fix uninit-value in asixmdioread()

The Linux kernel CVE team has assigned CVE-2021-47101 to this issue.

Upstream advisory: https://lore.kernel.org/linux-cve-announce/2024030415-CVE-2021-47101-f3fa@gregkh/T

— Red Hat

Affected Software

127 affected componentsFixes available
Linux Linux kernel>=4.9<5.15.12
Linux Linux kernel=5.16-rc1
Linux Linux kernel=5.16-rc2
Linux Linux kernel=5.16-rc3
Linux Linux kernel=5.16-rc4
Linux Linux kernel=5.16-rc5
Linux Linux kernel=5.16-rc6
IBM Security Verify Governance<=ISVG 10.0.2
IBM Security Verify Governance, Identity Manager Software Stack<=ISVG 10.0.2
IBM Security Verify Governance, Identity Manager Virtual Appliance<=ISVG 10.0.2
IBM Security Verify Governance Identity Manager Container<=ISVG 10.0.2
debian/linux<=5.10.223-1, <=5.10.234-1
6.1.129-16.1.135-16.12.25-16.12.27-1
redhat/kernel<5.15.12
5.15.12
redhat/kernel<5.16
5.16
ubuntu/linux-azure<4.15.0-1187.202~14.04.1
4.15.0-1187.202~14.04.1
ubuntu/linux-aws-hwe<4.15.0-1179.192~16.04.1
4.15.0-1179.192~16.04.1
ubuntu/linux-azure<4.15.0-1187.202~16.04.1
4.15.0-1187.202~16.04.1
ubuntu/linux-gcp<4.15.0-1172.189~16.04.1
4.15.0-1172.189~16.04.1
ubuntu/linux-hwe<4.15.0-236.248~16.04.1
4.15.0-236.248~16.04.1
ubuntu/linux-oracle<4.15.0-1141.152~16.04.1
4.15.0-1141.152~16.04.1
ubuntu/linux-hwe-edge*
ubuntu/linux<4.15.0-236.248
4.15.0-236.248
ubuntu/linux-aws<4.15.0-1179.192
4.15.0-1179.192
ubuntu/linux-aws-5.0*
ubuntu/linux-aws-5.3*
ubuntu/linux-aws-5.4<5.4.0-1137.147~18.04.1
5.4.0-1137.147~18.04.1
ubuntu/linux-azure*
ubuntu/linux-azure-4.15<4.15.0-1187.202
4.15.0-1187.202
ubuntu/linux-azure-5.3*
ubuntu/linux-azure-5.4<5.4.0-1142.149~18.04.1
5.4.0-1142.149~18.04.1
ubuntu/linux-azure-edge*
ubuntu/linux-gcp*
ubuntu/linux-gcp-4.15<4.15.0-1172.189
4.15.0-1172.189
ubuntu/linux-gcp-5.3*
ubuntu/linux-gcp-5.4<5.4.0-1141.150~18.04.1
5.4.0-1141.150~18.04.1
ubuntu/linux-gke-4.15*
ubuntu/linux-gke-5.4*
ubuntu/linux-gkeop-5.4*
ubuntu/linux-hwe*
ubuntu/linux-hwe-5.4<5.4.0-204.224~18.04.1
5.4.0-204.224~18.04.1
ubuntu/linux-hwe-edge*
ubuntu/linux-ibm-5.4<5.4.0-1084.89~18.04.1
5.4.0-1084.89~18.04.1
ubuntu/linux-kvm<4.15.0-1162.167
4.15.0-1162.167
ubuntu/linux-oem*
ubuntu/linux-oracle<4.15.0-1141.152
4.15.0-1141.152
ubuntu/linux-oracle-5.0*
ubuntu/linux-oracle-5.3*
ubuntu/linux-oracle-5.4<5.4.0-1136.145~18.04.1
5.4.0-1136.145~18.04.1
ubuntu/linux-raspi-5.4<5.4.0-1121.133~18.04.1
5.4.0-1121.133~18.04.1
ubuntu/linux-aws-fips<4.15.0-2117.123
4.15.0-2117.123
ubuntu/linux-azure-fips<4.15.0-2096.102
4.15.0-2096.102
ubuntu/linux-fips<4.15.0-1134.145
4.15.0-1134.145
ubuntu/linux-gcp-fips<4.15.0-2080.86
4.15.0-2080.86
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.4.0-204.224
5.4.0-204.224
ubuntu/linux-aws<5.4.0-1137.147
5.4.0-1137.147
ubuntu/linux-azure<5.4.0-1142.149
5.4.0-1142.149
ubuntu/linux-bluefield<5.4.0-1097.104
5.4.0-1097.104
ubuntu/linux-gcp<5.4.0-1141.150
5.4.0-1141.150
ubuntu/linux-ibm<5.4.0-1084.89
5.4.0-1084.89
ubuntu/linux-iot<5.4.0-1048.51
5.4.0-1048.51
ubuntu/linux-kvm<5.4.0-1125.133
5.4.0-1125.133
ubuntu/linux-oracle<5.4.0-1136.145
5.4.0-1136.145
ubuntu/linux-raspi<5.4.0-1121.133
5.4.0-1121.133
ubuntu/linux-xilinx-zynqmp<5.4.0-1056.60
5.4.0-1056.60
ubuntu/linux-aws-5.11*
ubuntu/linux-aws-5.13*
ubuntu/linux-aws-5.8*
ubuntu/linux-azure-5.11*
ubuntu/linux-azure-5.13*
ubuntu/linux-azure-5.8*
ubuntu/linux-azure-fde*
ubuntu/linux-gcp-5.11*
ubuntu/linux-gcp-5.13*
ubuntu/linux-gcp-5.8*
ubuntu/linux-gke*
ubuntu/linux-gke-5.15*
ubuntu/linux-gkeop*
ubuntu/linux-hwe-5.11*
ubuntu/linux-hwe-5.13*
ubuntu/linux-hwe-5.8*
ubuntu/linux-intel-5.13*
ubuntu/linux-oem-5.10*
ubuntu/linux-oem-5.13*
ubuntu/linux-oem-5.6*
ubuntu/linux-oracle-5.11*
ubuntu/linux-oracle-5.13*
ubuntu/linux-oracle-5.8*
ubuntu/linux-raspi2*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.11*
ubuntu/linux-riscv-5.8*
ubuntu/linux-aws-fips<5.4.0-1137.147+fips1
5.4.0-1137.147+fips1
ubuntu/linux-azure-fips<5.4.0-1142.149+fips1
5.4.0-1142.149+fips1
ubuntu/linux-fips<5.4.0-1111.121
5.4.0-1111.121
ubuntu/linux-gcp-fips<5.4.0-1141.150+fips1
5.4.0-1141.150+fips1
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux-allwinner-5.19*
ubuntu/linux-aws-5.19*
ubuntu/linux-aws-6.2*
ubuntu/linux-azure-5.19*
ubuntu/linux-azure-6.2*
ubuntu/linux-azure-fde-5.19*
ubuntu/linux-azure-fde-6.2*
ubuntu/linux-gcp-5.19*
ubuntu/linux-gcp-6.2*
ubuntu/linux-hwe-5.19*
ubuntu/linux-hwe-6.2*
ubuntu/linux-intel-iot-realtime*
ubuntu/linux-lowlatency-hwe-5.19*
ubuntu/linux-lowlatency-hwe-6.2*
ubuntu/linux-nvidia-6.2*
ubuntu/linux-oem-5.17*
ubuntu/linux-oem-6.0*
ubuntu/linux-oem-6.1*
ubuntu/linux-realtime*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.19*
ubuntu/linux-starfive-5.19*
ubuntu/linux-starfive-6.2*
ubuntu/linux-raspi-realtime*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 6.1.129-1Fixed in 6.1.135-1Fixed in 6.12.25-1Fixed in 6.12.27-1
  2. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 5.15.12
  3. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 5.16
  4. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 4.15.0-1187.202~14.04.1
  5. Upgrade

    Upgrade ubuntu/linux-aws-hwe to a version that resolves this vulnerability.

    Fixed in 4.15.0-1179.192~16.04.1
  6. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 4.15.0-1187.202~16.04.1
  7. Upgrade

    Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.

    Fixed in 4.15.0-1172.189~16.04.1
  8. Upgrade

    Upgrade ubuntu/linux-hwe to a version that resolves this vulnerability.

    Fixed in 4.15.0-236.248~16.04.1
  9. Upgrade

    Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.

    Fixed in 4.15.0-1141.152~16.04.1
  10. Upgrade

    Upgrade ubuntu/linux to a version that resolves this vulnerability.

    Fixed in 4.15.0-236.248
  11. Upgrade

    Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.

    Fixed in 4.15.0-1179.192
  12. Upgrade

    Upgrade ubuntu/linux-aws-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1137.147~18.04.1
  13. Upgrade

    Upgrade ubuntu/linux-azure-4.15 to a version that resolves this vulnerability.

    Fixed in 4.15.0-1187.202
  14. Upgrade

    Upgrade ubuntu/linux-azure-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1142.149~18.04.1
  15. Upgrade

    Upgrade ubuntu/linux-gcp-4.15 to a version that resolves this vulnerability.

    Fixed in 4.15.0-1172.189
  16. Upgrade

    Upgrade ubuntu/linux-gcp-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1141.150~18.04.1
  17. Upgrade

    Upgrade ubuntu/linux-hwe-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-204.224~18.04.1
  18. Upgrade

    Upgrade ubuntu/linux-ibm-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1084.89~18.04.1
  19. Upgrade

    Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.

    Fixed in 4.15.0-1162.167
  20. Upgrade

    Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.

    Fixed in 4.15.0-1141.152
  21. Upgrade

    Upgrade ubuntu/linux-oracle-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1136.145~18.04.1
  22. Upgrade

    Upgrade ubuntu/linux-raspi-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1121.133~18.04.1
  23. Upgrade

    Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.

    Fixed in 4.15.0-2117.123
  24. Upgrade

    Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.

    Fixed in 4.15.0-2096.102
  25. Upgrade

    Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.

    Fixed in 4.15.0-1134.145
  26. Upgrade

    Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.

    Fixed in 4.15.0-2080.86
  27. Upgrade

    Upgrade ubuntu/linux to a version that resolves this vulnerability.

    Fixed in 5.4.0-204.224
  28. Upgrade

    Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.

    Fixed in 5.4.0-1137.147
  29. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 5.4.0-1142.149
  30. Upgrade

    Upgrade ubuntu/linux-bluefield to a version that resolves this vulnerability.

    Fixed in 5.4.0-1097.104
  31. Upgrade

    Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.

    Fixed in 5.4.0-1141.150
  32. Upgrade

    Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.

    Fixed in 5.4.0-1084.89
  33. Upgrade

    Upgrade ubuntu/linux-iot to a version that resolves this vulnerability.

    Fixed in 5.4.0-1048.51
  34. Upgrade

    Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.

    Fixed in 5.4.0-1125.133
  35. Upgrade

    Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.

    Fixed in 5.4.0-1136.145
  36. Upgrade

    Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.

    Fixed in 5.4.0-1121.133
  37. Upgrade

    Upgrade ubuntu/linux-xilinx-zynqmp to a version that resolves this vulnerability.

    Fixed in 5.4.0-1056.60
  38. Upgrade

    Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1137.147+fips1
  39. Upgrade

    Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1142.149+fips1
  40. Upgrade

    Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1111.121
  41. Upgrade

    Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1141.150+fips1

Event History

Mar 4, 2024
CVE Published
via MITRE·06:10 PM
Data Sourced
via MITRE·06:10 PM
Description
Data Sourced
via OSV·06:15 PM
DescriptionSeverityAffected Software
Mar 5, 2024
Data Sourced
via Red Hat·02:39 PM
DescriptionSeverityAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Frequently Asked Questions

1

What is the severity of CVE-2021-47101?

CVE-2021-47101 has a medium severity rating due to potential uninitialized value exposure in the Linux kernel's asix driver.

2

How do I fix CVE-2021-47101?

To fix CVE-2021-47101, update your Linux kernel to versions 5.15.12, 5.16, or the specified secure versions listed for Debian.

3

Which versions of the Linux kernel are affected by CVE-2021-47101?

CVE-2021-47101 affects several versions of the Linux kernel prior to 5.15.12 and various releases in the 5.16 and prior ranges.

4

Is CVE-2021-47101 exploitable in production environments?

CVE-2021-47101 may be exploitable in production environments if the vulnerable kernel version is deployed and facing network access.

5

Where can I find more information about CVE-2021-47101?

Detailed information and patches regarding CVE-2021-47101 can be found in the Linux kernel's release notes and security advisories.

Company

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